54
Inside Corner Terminations
Inside corner vent terminations are permitted provided that:
Only two exterior walls come together to form an angle of 90 degrees to 135 degrees. There are no other exterior walls attached to either
wall to form an alcove.
The clearance distances apply when the vent is at least 3 feet (1 meter) from, but not more than 6 feet (2 meters) away from an inside
corner.
For vent terminations located more than 6 feet (2 meters) from an inside corner, refer to the appropriate Direct Vent Clearance Table for all
two pipe terminations or Non
−
Direct Vent Clearance Table for all single pipe terminations.
The clearance distances to items between the vent termination and the outside corner, refer to the appropriate Direct Vent Clearance Table
for all two pipe terminations or Non
−
Direct Vent Clearance Table for all single pipe terminations.
For clearance distances when vent termination is located more than 6 ft. (2 M) away from an inside corner, refer to the
appropriate Direct Vent or Non
−
Direct Vent Clearance Table.
Clearance description when termination is at least 3 ft. (1 M) away and not more than 6 ft. (2 M) away from an inside corner.
Clearance above grade, veranda, porch, deck, balcony or anticipated snow level
12
−
in. (305 mm)
Clearance to a permanently closed window on either Wall A or Wall B
12
−
in. (305 mm)
Vertical clearance to a soffitt located above the vent termination within a horizontal distance of 2 ft. (61 cm) from
the centerline of the vent termination
6 ft. (2 M)
Clearance to a ventilation exhaust (including HRV/ERV) on either Wall A or Wall B
12
−
in. (305 mm)
Clearance above paved sidewalk or paved driveway located on public property
7 ft. (2.1 M)
Clearance under a veranda, porch, deck, or balcony
N.P.*
No operable windows, doors or intakes of any type are permitted on Wall B between the vent termination and the inside corner
when the vent termination is at least 3 ft. (1 M) away and not more than 6 ft. (2 M) away from an inside corner.
The following items on Wall A must be located at least 3 ft. (1 M) away from the inside corner when a vent termination is located
on Wall B and the vent termination is at least 3 ft. (1 M) away or not more than 6 ft. (2 M) away from an inside corner.
A window or door that may be opened
The centerline extended above electrical meter or gas service regulator assembly
A service regulator vent outlet
The centerline of a dryer or water heater vent, or other appliance’s vent intake
A non
−
mechanical air supply inlet
Clearance distances shown for Wall A are measured horizontally from the exit of the termination on Wall B to the closest edge of
the item shown below.
Clearance to a mechanical air supply (including HRV/ERV) inlet unless termination is 3 ft. (1 M) above the
horizontal line of the intake
10 ft. (3 M)
For clearance distances from a vent termination to the outside corner of the wall, refer to the appropriate Direct Vent or
Non
−
Direct Vent Clearance Table
*N.P. = Not Permitted
*N/A = Not Applicable
912S
